Door frame



FIG. 1 is a first perspective view of a door frame showing our new design.

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof;

FIG. 7 is an opposite side view thereof; and,

FIG. 8 is a rear view thereof.

The broken lines depict portions of the door frame that form no part of the claimed design. 

CLAIM The ornamental design for a door frame, as shown and described. 